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Titolo:
A phylogenetic analysis of Heterorhabditis (Nemata : Rhabditidae) based oninternal transcribed spacer 1 DNA sequence data
Autore:
Adams, BJ; Burnell, AM; Powers, TO;
Indirizzi:
Univ Nebraska, Dept Plant Pathol, Lincoln, NE 68583 USA Univ Nebraska Lincoln NE USA 68583 pt Plant Pathol, Lincoln, NE 68583 USA Natl Univ Ireland Maynooth, Dept Biol, Maynooth, Kildare, Ireland Natl Univ Ireland Maynooth Maynooth Kildare Ireland th, Kildare, Ireland
Titolo Testata:
JOURNAL OF NEMATOLOGY
fascicolo: 1, volume: 30, anno: 1998,
pagine: 22 - 39
SICI:
0022-300X(199803)30:1<22:APAOH(>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
26S RIBOSOMAL-RNA; N-SP RHABDITIDA; ENTOMOPATHOGENIC NEMATODES; GEL ELECTROPHORESIS; EVOLUTIONARY RATES; PERMUTATION TESTS; MITOCHONDRIAL-DNA; TREE TOPOLOGIES; GENUS; REGION;
Keywords:
entomopathogenic nematode; evolution; Heterorhabditis; ITS1; nematode; phylogenetic analysis; ribosomal DNA; species concepts;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
80
Recensione:
Indirizzi per estratti:
Indirizzo: Adams, BJ Univ Nebraska, Dept Plant Pathol, Lincoln, NE 68583 USA Univ Nebraska Lincoln NE USA 68583 athol, Lincoln, NE 68583 USA
Citazione:
B.J. Adams et al., "A phylogenetic analysis of Heterorhabditis (Nemata : Rhabditidae) based oninternal transcribed spacer 1 DNA sequence data", J NEMATOL, 30(1), 1998, pp. 22-39

Abstract

Internal transcribed spacer 1 sequences were used to infer phylogenetic relationships among 8 of the 9 described species and one putative species of the entomopathogenic nematode genus Heterorhabditis. Sequences were alignedand optimized based on pairwise genetic distance and parsimony criteria and subjected to a variety of sequence alignment parameters. Phylogenetic trees were constructed with maximum parsimony, cladistic, distance, and maximum likelihood algorithms. Our results gave strong support for four pairs of sister species, while relationships between these pairs also were resolved but less well supported. The ITS1 region of the nuclear ribosomal repeat was a reliable source of homologous characters for resolving relationships between closely related taxa but provided more tenuous resolution among more divergent lineages. A high degree of sequence identity and lack of autapomorphic characters suggest that sister species pairs within three distinct lineages may be mutually conspecific. Application of these molecular data andcurrent morphological knowledge to the delimitation of species is hinderedby an incomplete understanding of their variability in natural populations.

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Documento generato il 01/10/20 alle ore 07:37:09